Synovial chondromatosis of the shoulder and biceps tendon.

uncommon, benign condition characterized by multiple nodules of hyaline cartilage in the subsynovial layer of joints, tendons, or bursal cavities. Three times more common in men than in women,1 it is most commonly diagnosed between the third and fifth decades of life.2 The knee is involved in two thirds of reported adult cases, followed in frequency by the hip, elbow, shoulder, and wrist.2 Extra-articular involvement of synovial chondromatosis is less common, with involvement of the biceps tendon reported only three times in the literature.3-5 Extraarticular involvement has not been reported in children. This article presents synovial chondromatosis of the left shoulder and biceps tendon sheath occurring in a pediatric patient.